Ampeg V-4B 100-Watt Tube Bass Head

100W Tube Bass Amplifier Head, with 3-band Tone Control, Lo/Hi Boost Switches, Balanced Line Out, and 2-/4-/8-ohm Speaker Outputs
Ampeg V-4B 100-Watt Tube Bass Head image 1
Ampeg V-4B 100-Watt Tube Bass Head image 1
Sweetwater Savings: $520.00 MSRP: $1,819.99
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Ampeg V-4B 100-Watt Tube Bass Head
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Ampeg Knows What Bass Players Need

From studio to stage, the Ampeg V-4B tube bass amplifier head has your bass tone covered. You're ready to groove at any gig with 100-watts of power and flexible tone-shaping capabilities. And you'll be able to get huge-sounding bass tones direct to the PA or your recording system thanks to an integrated DI output. The V-4B is the same width as other SVT heads, which means it's a perfect fit for any Classic Series Ampeg speaker cabinet. It's almost effortless to craft hard-hitting bass tone with the Ampeg V-4B tube bass amplifier.

Ampeg V-4B 100W Tube Bass Amplifier Head at a Glance:
  • Powerful tone-shaping onboard
  • Flexible speaker output options
  • Built-in DI output for maximum convenience
Powerful tone-shaping onboard

The Ampeg V-4B sports a 3-band EQ for standard tone shaping, plus ultra-high and ultra-low boost controls for added power and note definition. You've got the control you need to fine-tune your bass guitar's tone for virtually any genre.

Flexible speaker output options

You can create virtually any type of bass rig you like with the V-4B thanks to 2-, 4-, and 8-ohm speaker outputs. The V-4B bass amp is ready to work with whatever speaker cabinets you already use, but it also has the expandability to add on to your rig in the future.

Built-in DI output for maximum convenience

It's hard to beat the simplicity of recording your bass guitar direct, and it's also the best way to supplement your tone on stage (by running direct into the PA). Thankfully, the Ampeg V-4B bass amp has a built-in direct output with ground lift switch, so you don't have to use a separate DI box.

Ampeg V-4B 100W Tube Bass Amplifier Head Features:
  • All-tube bass amplifier head with classic Ampeg style
  • 2-/4-/8-ohm speaker outputs accommodate virtually any speaker configuration
  • Balanced DI output with ground lift makes it easy to record direct or send to PA system
  • 3-band EQ with switchable mid frequency for powerful tone shaping
  • Ultra-low and ultra-high controls add low-end emphasis and high-end definition
Big, bold bass tone is yours with the Ampeg V-4B!

Additional Media

Bass Guitar Amp Buying Guide
V-4B 100-Watt Tube Bass Head User Manual

Tech Specs

Type Tube
Number of Channels 1
Total Power 100W
EQ 3-band, Lo/Hi Boost Switches
Number of Tubes 8
Preamp Tubes 2 x 12AX7
Power Tubes 4 x 6L6GC
Inputs 2 x Instrument
Outputs 5 x Speaker
Height 11"
Width 24"
Depth 11"
Weight 41 lbs.
Manufacturer Part Number 2041194-00

Customer Reviews

Based on 7 reviews
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All I expected!

The guy who rated the 22stars is way off base. Amp was perfect out of the box, works well and the only hum I got was when the gain was over powered. I hooked my SansAmp 21 Para Driver to it and this completely eliminated a hum at ANY level. Just barely move the guitars volume knob....and BOOM!...sweet tone galore.. A hum is from under powered drive and amps for the desired volume. That's it. I 100% endorse this amp. If you want major power from the amp the Heritage 300 watt Ampeg.

Great amp....get one!!!

I've been wanting one of these since they came out and finally did it.It came in on Friday and i took it out on a gig Sat. Paired with SVT 610 it was amazing! Plenty of volume and tubey greatness. Get one its well worth it!
Music background: Semi-pro musician

ampeg v4-b bass amp

I have owned SVT 300 watt in the past. amp was just too heavy and more power than I needed. V4-b was just right on weight and power. Its sound was out of sight. very tube sounding at all volumns.
Music background: Pro for 40 years

Excellent all tube head!

I've always loved Ampeg tube heads but after over 40 years of playing, I just don't need 300 watts of SVT or the weight that goes with it. Enter the reissue of the V-4B. It has that all tube Ampeg sound at half the weight of an SVT but it's still loud and punchy. The workmanship is excellent. I've been playing through it for three months now with zero problems. Highly recommended if you like tubes!
Music background: 40+ years of playing bass in clubs and bars.

Ampeg V-4B 100 Watt Tube Bass Head

I have used this head for some time now and have had chance to see how it performs. Love the way it sounds on all accounts. There is one flaw I do NOT like about this head. It seems Ampeg did not engineer this head to have the build in bias adjustment(s) as with the more expensive heads they manufacture. to me that is like having to take my car to the dealership every time I need to adjust air in my tires. Why not put the adjustment on ALL the heads. At least that way when you do have to replace the "power tubes" then you just do a few adjustments on the back of the head and it is done without having to take the head to a shop just to bias ( make it right). I would have put down the extra $$ if I had known this from the beginning. That is why I gave this head a 4 and not a 5. Shame on Ampeg for being so cheap in this regard.

Sweetwater Advice

Ampeg V-4B

The original V-4B was more or less a one-tone machine, but this reissue is more versatile. The DI and -15 dB pad are welcome modern additions... Together the components deliver both the classic tones and tighter, more focused modern ones. It's a welcome evolution, and one that may attract bassists who might not normally look to Ampeg for their sound....
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See also: Bass Amp Heads, Ampeg, Ampeg Bass Guitar Amp Heads